Lamp-socket structure



H. A. FRAMBURG.

LAMP SOCKET STRUCTURE.

APPLICATION FILED MAY 7. 1919.

Patented Apr. 6, 1920.

' UNITED- STATES PATENT OFFICE.

I mar-A. FRAMBURG, or BERWYN, ILLINOIS.

LAMP-sooner STRUCTURE.

To all whom z'tmay concern:

Be it known that I, HENRY A. Feature, a citizen of the United States, and a resident of Berw n, in the county of Cook,

State of Illinois, have invented certain new 7. and useful Improvements in Lamp-Socket Structures, ofwhichthe following is a specification. I

Myinvention relates to lamp socket structures and covers improved construction which is particularly useful in connection with lamp shade holders which surround the socket structure.

My invention is particularly useful in connection with such shade holder structures as are disclosed in my-co-pendi'ng application executed of even date herewith.

The object of my invention is to provide a container structure for the lamp, supporting socket comprising separable parts,- one of the parts forming adequate supportfor a shade holder-and the other part being applicable to said shade holder part to clamp the lamp socket rigidly in place. This construction enables the lamp socket terminals to be readily and easily accessible from the side after the shade parts'have been removed from the holder.

The various features of my inventionlare clearly disclosed on the accompanying draw- 111 in which-e igure 1- is'a side elevational view of my improved socket structure showing a shade holder thereon, f

Fig.2 is a vertical diametral sectional view. of the socket container showing the socket therein, v

Fig. 3 is a lower end view' of the stationary; member'of the socket container and ig.' 4 is a lower end view of the entire socket'structure.

Referring to the drawing the upper or stationary member 5 of the socket closure or housing is a cylindricalblock of porcelain or other insulating material and has the pocket 6 therein from which'the' axial passagewav 7 leads. A plate 8 is secured Y a ainst the top of the member 5 by screws 5 or otherwise and has the flange 9- ex- 'tions 18 and 19 into the pockets of the socket tending therefrom which is both internally and externally threaded. The internal threads receive a conduit pipe 10- and the external threads serve to receive a nut 11 Specification of Letters Patent.

7 Patented Apr. 6, 1920; Application-filed may 7, 1919. Serial No. 295,420. v

and 13 which are preferably of spring'y sheet metal and secured by means of bolts 14. The arms 12 and 13 extend from the member 5 in axial direction and'at their outer ends have the inwardly, extending 'pro ect1ons 15 and 16 which are readily formed by deflecting the sheet metal. 1 These .arms receive between themthe head? 17 of the socket, this head having the depressions or pockets 18 and 19 for receiving the ex- Th cord 20 extends through the conduit 10 a d the conductors 21 and 22 are connected with the tensions 15 and lfinrespectively.

socket terminals 23 and 24 respectively, of

the tip and sleeve members 25 and 26 bf the socke l The separablemember for the socket inclosing structure is in the form of a sleeve 27 whose outer .end is of reduced diameter and provided with internal threads 28 for receiving the threaded sleeve member 26 of the socket, When the socket structure is first installed, its member 5 is secured "to the conduit pipe 10. The socket is then in-...-

serted between the arms 12 and 13 which pass along the sides of the sockets head and finally engage with their projections 15' and 16 in the pockets 18 and 19. The

ends of the conductor. leads 21 and 22 are then secured to the socket terminals '23 and 24. The member 27. is-now applied by screwing it on. to the sleeve terminal 26 of the socket, the inner end of the member 27 receiving the head of-the socket and engagwith its inner side against the outermember 27 will besecurely locked together and the socket and the member securely clampbetween them the arms 12 and13 and hold these arms rigidly in place so that a very rigid socket structure is formed.) The arms 12 and 13 thus support the socket and the closure member 27.

'To facilitate guidance of the arm projechead, the socket head is provided with guide ridges 31 which engage in guide grooves 32 formed in the member 5. If desired the inner surface of the inner end of the member 27 may be roughened or ridges or corrugations 33 which afford fricprovided with tional and detent engagement of the member 27 with the arms- 12 and 13, this frictional or detent engagement serving to lock the member 27 against loosening when the shoulders 29 and 30 have not been drawn into tight engagement. 1 r

In Fig. 1, I have shown shade holder supporting arms 34 extending downwardly alongside of the socket structure from the top plate 8, the lower ends of these arms being bent to provide inner shade engaglng lugs 35 and outer pockets 36; As disclosed in my co-pending application referredto, these outer pockets support a split ring 37 -whose one end is connected with the end of a With the improved construction of the socket structure here disclosed the structure.

can be readily opened to give ready access to the socket terminals when the shade and protecting cap have been removed. As soon as the member 27 has been unscrewed from F the socket, the socket terminals are accessible and when these terminals have been opened the socket can be readily entirely withdrawn from its supporting arms 12 and 13. When the socket is slipped into the member 5 the spring arms 12 and 13 will temporarily hold it in place until the sleeve member 27 is screwed on to the socket sleeve end and then the arms will be securely clam ed against the socket head and the mem er 27 will be locked in place.

I do not desire to be limited to the exact construction and arrangement shown and described as changes are possible which would still come within the scope of my invention.

I claim as follows:

1. In a socket structure, the combination of a top closure member, arms extending downwardly from said member, a socket member having a head received between said arms and having a threaded sleeve terminal, and a-lower closure member for receiving said socket and having a threaded end for engaging said threaded sleeve, said arms being clamped between said socket head and said lower closure member.

2. A socket structure comprising a top member having an entrance for current conductors, arms extending from said top member, a socket member comprising a head and a threaded sleeve terminal, said arms havmasses ing projections and said head having declosure member, s ring arms extending from said closure mem er, a socket member havmg a head and a threaded terminal sleeve,

said head being received between said arms,

and an annular closure member having threaded engagement with said sleeve and adapted to surround said head to clamp said arms thereto.

4. A socket structure comprising a top closure member, spring arms extending downwardly from said member, a socket member having a head and a threaded terminal sleeve, said arms having projections and said head having depressions for receiving said projections, and an annular closure member having threaded engagement with said terminal sleeve and surrounding said head whereby said arms are securely clamped between said head and an.- nular member and said head and member thus rigidly secured to said arms.

5. A socket structure comprising a top closure member, sheet metal arms extending from said closure member and having projections at their ends, a socket member having a head and a threaded terminal sleeve, said head having depressions for receiving said arm projections, a ring for surrounding said head to clamp said arms securely thereto, and a threaded extension on said ring having threaded engagementwith said terminal sleeve whereby said ring may be applied in arm clamping position.

6. A socket structure comprising a supportingqnember, arms extending therefrom, a socket member having a head and a threaded sleeve, said head being received between said arms, a ring having threaded engagement with said threaded sleeve, and a flange on said ring for receiving thesockct head to clamp said arms thereto.

7. A socket structurecomprising a supporting member, arms extending from said supporting-member, a socket member having a head and a threaded sleeve, said arms and head having frictional projection and depression engagement, a ring having threaded engagement with said sleeve, and a flange on said ring for surrounding the arms on said supporting member and clampin them securely against the head.

in witness whereof, I-hereunto subscribe my name this 2nd day of May A. D., 1919.

HENRY A. FRAMBURG. 

